Abstract

During a survey of putative fungal pathogens infecting oak trees in the Gangwon Province of the Republic of Korea, a fungus resembling a Ceratocystis sp. was repeatedly isolated from natural wounds on Quercus variabilis. Morphological comparisons and DNA sequence comparisons based on partial β-tubulin and TEF-1α gene regions showed that the fungus resided in a distinct lineage. This novel Ceratocystis species is described here as C. quercicola sp. nov. This is the first novel species of Ceratocystis to be reported from Korea. A pathogenicity test showed that it can cause lesions on inoculated trees but that it had a very low level of aggressiveness. The discovery of this fungus suggests that additional taxa residing in Ceratocystis are likely to be discovered in Korea in the future.

摘要

在对大韩民国江原道州的橡树感染真菌的病原体的调查中，发现了一种类似于Ceratocystis sp。的真菌。被反复从栎属自然伤口中分离出来。基于部分β-微管蛋白和TEF-1α基因区域的形态学比较和DNA序列比较表明，真菌存在于不同的谱系中。这种新颖的Ceratocystis种在这里被描述为C. quercicola sp.。十一月 这是Ceratocystis的第一个新物种由韩国报道。致病性测试表明，它可以对接种的树木造成损害，但侵略性很低。这种真菌的发现表明，将来在韩国很可能会发现更多存在于Ceratocystis中的类群。